... 3.Light in weight 4.Lithium battery 5.support Micro SD mini card reader mp3 R&D Our R&D team consists of ... LCM display3.Without built-in flash memory, support Micro SD/ TF card directly;4.Card reader MP3 (supports many audio formats, such as MP3 ... , WMA, WMV and WAV);5.Can be used as memory card reader too;6.With built-in polymer Lithium battery